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Finding the Fourth Proportional to 664,727.40, 918,523.32 and 473,408.64

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Solution

The fourth proportional to 664,727.40, 918,523.32 and 473,408.64 is: 654,158.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,727.40 : 918,523.32 = 473,408.64 : x
  2. Step 2: Convert to fraction form
    664,727.40/918,523.32 = 473,408.64/x
  3. Step 3: Cross multiply
    664,727.40x = 918,523.32 × 473,408.64
  4. Step 4: Simplify right side
    664,727.40x = 434,836,875,729.49
  5. Step 5: Solve for x
    x = 434,836,875,729.49/664,727.40
  6. Step 6: Final answer
    x = 654,158.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.